Restore the upload button to Special:Upload in stable

Also make sure it refreshes the page on a successful upload.
Regression introduced in I89fce902245f2fd0913d0f28179a8879fdd5717e
Fixes QA test features/upload_image.feature
Bug: 59602

Change-Id: I542ee641611eede56a35288cd1b64de49202ba9c
Merge "Restore the upload button to Special:Upload in stable"